On August 17, 2000, approximately 1845 mountain daylight time, a tailwheel equipped Cessna 170B, N3007A, registered to and being flown by a private pilot, was substantially damaged following a loss of control during a balked landing at the Nampa Municipal airport, Nampa, Idaho. The pilot and passenger were uninjured. Visual meteorological calm wind conditions existed, and no flight plan had been filed. The flight, which was personal, was operated under 14CFR91, and originated from Nampa, approximately 1745. The pilot was interviewed telephonically and reported that he was a little high and fast on his approach to runway 11, a 5,000-foot long by 75-foot wide asphalt strip. After touching down on the main wheels, and before the tailwheel touched down, he applied full power to initiate a "go-around" and the aircraft began to veer off the left side of the runway. During the veer, the right wingtip contacted the ground. The pilot reported that there was no mechanical malfunction with the aircraft during the event, and that the winds were light to calm. The pilot subsequently reported that his "approach was high, and touchdown long, and a go around was attempted. Lost control and ground looped to the left of the runway" (refer to attached NTSB Form 6120.1/2.